Weather Alert in Wyoming
Red Flag Warning issued August 13 at 2:09AM MDT until August 13 at 8:00PM MDT by NWS Riverton WY
AREAS AFFECTED: Salt and Wyoming Ranges/West Zone Bridger Teton NF; North Zone Bridger Teton NF and Grand Teton NP; West Wind River Mountains/East Zone Bridger Teton NF
DESCRIPTION: * IMPACTS: Low Humidities...Very Dry Fuels...Hot Temperatures...and Strong Gusty Winds...and Increasing Thunderstorm Activity could cause erratic fire behavior. * AFFECTED AREA: In Northwest WY Fire Zone....415. In West Central WY Fire Zones...414...416. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Park. In West Central WY...Lincoln...Sublette...Teton. * WIND: West 10 to 20 mph with gusts up to 35 mph. * THUNDERSTORMS: There is a 20 to 40 percent chance of thunderstorms, with gusty winds and frequent lightning being the main threats. * HUMIDITY: Higher elevations will see RHs around 20 percent, however lower valleys will see RHs around 13 to 17 percent Wednesday afternoon. * TEMPERATURES: Highs in the upper 70s.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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